public class Words
{
   /**
      Computes a string that repeats every letter 't' in the original string.
      @param s any string
      @return a string with the same characters as s, except that every letter 't' is repeated
   */
   public String stutter(String s)
   {
      // your work here
      String str = "";
      for(int i = 0;i < s.length();i++){
         if(s.charAt(i) == 't'){
            str += "tt";
         }else{
            str += s.charAt(i);
         }
      }
      return str;
   }
}